Touch display device

ABSTRACT

A touch display device including a display panel and a touch device is provided. The display panel includes a plurality of sub-pixels. Each of the sub-pixels includes a pixel electrode and a switching element. The touch device is located on the display panel and includes a touch electrode area and a dummy electrode area. The touch device includes an electrode structure and a conductive mesh. The conductive mesh includes a plurality of reticulated repeating units. Each of the reticulated repeating units is overlapped with at least one corresponding sub-pixel and includes first and second X-shaped conductive structures. Two ends of the first X-shaped conductive structure are connected to two ends of the second X-shaped conductive structure. The first and second X-shaped conductive structures in the touch electrode area are in a continuous pattern. The first and second X-shaped conductive structures in the dummy electrode area are in a discontinuous pattern.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation application of and claims thepriority benefit of U.S. application Ser. No. 16/865,427, filed on May4, 2020, now allowed, which claims the priority benefit of Taiwanapplication serial no. 108127172, filed on Jul. 31, 2019. The entiretyof each of the above-mentioned patent applications is herebyincorporated by reference herein and made a part of this specification.

BACKGROUND OF THE INVENTION Field of the Invention

The invention relates to a touch display device, and more particularlyto a touch display device including a touch electrode area and a dummyelectrode area.

Description of Related Art

With the advancement of technology, more and more touch devices haveemerged in the market, and various related techniques have continuouslybeen developed. In some personal electrical appliances (such as mobilephones, tablet computers, smart watches, etc.), the touch electrodes arecombined with a display panel to form a touch display device having botha touch function and a display function.

In order to perform detailed work (such as drawing or writing) by usingthe touch function of the touch display device, an active stylus isoften used as an auxiliary tool for the work. The active stylus hasbetter pen touch sensing function, and when used with the touch displaydevice, the depth of the pen touch may be sensed. For example, with theaid of an active stylus, when the user writes with greater force, thetouch display device may display a thicker handwriting, and when theuser writes with less force, the touch control display device maydisplay a thinner handwriting. In order to make the touch display devicework better with the active stylus, how to improve the performance ofthe touch display device is currently an issue to be solved.

SUMMARY OF THE INVENTION

The invention provides a touch display device, wherein a touch devicethereof has the advantage of low resistance, and thus the touch displaydevice has better performance.

An embodiment of the invention provides a touch display device includinga display panel and a touch device. The display panel includes aplurality of sub-pixels. Each of the sub-pixels includes a pixelelectrode and a switching element electrically connected to the pixelelectrode. The touch device is located on the display panel and has atouch electrode area and a dummy electrode area. The touch deviceincludes an electrode structure and a conductive mesh. The conductivemesh includes a plurality of reticulated repeating units located in thetouch electrode area and the dummy electrode area. Each of thereticulated repeating units is overlapped with at least onecorresponding sub-pixel and includes a first X-shaped conductivestructure and a second X-shaped conductive structure. Two ends of thefirst X-shaped conductive structure are connected to two ends of thesecond X-shaped conductive structure. The first X-shaped conductivestructure and the second X-shaped conductive structure in the touchelectrode area are in a continuous pattern. The first X-shapedconductive structure and the second X-shaped conductive structure in thedummy electrode area are in a discontinuous pattern.

Based on the above, since the first X-shaped conductive structure andthe second X-shaped conductive structure in the touch electrode area arein a continuous pattern, and the first X-shaped conductive structureand/or the second X-shaped conductive structure in the dummy electrodearea are in a discontinuous pattern, in addition to reducing theresistance of the touch device, the difference in reflectance betweenthe touch electrode area and the dummy electrode area may also bereduced, thereby improving the performance of the touch display device.

In order to make the aforementioned features and advantages of thedisclosure more comprehensible, embodiments accompanied with figures aredescribed in detail below.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are included to provide a furtherunderstanding of the invention, and are incorporated in and constitute apart of this specification. The drawings illustrate embodiments of theinvention and, together with the description, serve to explain theprinciples of the invention.

FIG. 1A is a cross-sectional view of a touch display device according toan embodiment of the invention.

FIG. 1B is a top view of a display panel according to an embodiment ofthe invention.

FIG. 2A is a top view of a touch display device according to anembodiment of the invention.

FIG. 2B is a top view of a touch electrode area of a touch displaydevice according to an embodiment of the invention.

FIG. 2C is a top view of a dummy electrode area of a touch displaydevice according to an embodiment of the invention.

FIG. 3A is a top view of a touch electrode area of a touch displaydevice according to an embodiment of the invention.

FIG. 3B is a top view of a dummy electrode area of a touch displaydevice according to an embodiment of the invention.

FIG. 4A is a top view of a touch electrode area of a touch displaydevice according to an embodiment of the invention.

FIG. 4B is a top view of a dummy electrode area of a touch displaydevice according to an embodiment of the invention.

FIG. 5A is a top view of a touch electrode area of a touch displaydevice according to an embodiment of the invention.

FIG. 5B is a top view of a dummy electrode area of a touch displaydevice according to an embodiment of the invention.

FIG. 6A to FIG. 9A are top views of a manufacturing method of a touchdevice according to an embodiment of the invention.

FIG. 6B to FIG. 9B are cross-sectional views of section line aa′ of FIG.6A to FIG. 9A, respectively.

DESCRIPTION OF THE EMBODIMENTS

FIG. 1A is a cross-sectional view of a touch display device according toan embodiment of the invention. FIG. 1B is a top view of a display panelaccording to an embodiment of the invention. In particular, FIG. 1Bomits some components in the display panel.

A touch display device 10 includes a display panel 100 and a touchdevice 200. In the present embodiment, the touch display device 10further includes a polarizer P1 and a polarizer P2.

The display panel 100 includes a plurality of sub-pixels P. In thepresent embodiment, the display panel 100 includes a first substrateSB1, a second substrate SB2, a display medium layer L, a colorconversion element C, and an active element layer AL. The display mediumlayer L, the color conversion element C, and the active element layer ALare located between the first substrate SB1 and the second substrateSB2.

The active element layer AL is located on the first substrate SB1 andincludes a plurality of scan lines SL1 to SLn, a plurality of data linesDL1 to DLm, and a plurality of sub-pixels P. The scan lines SL1 to SLnand the data lines DL1 to DLm are intersected with each other. Thesub-pixels P include an active element T and a pixel electrode PE. Theactive element T may be a bottom gate thin film transistor or a top gatethin film transistor including a gate, a channel, a source, and a drain.The active element T is electrically connected to a corresponding scanline SL1 to SLn and a corresponding data line DL1 to DLm. In addition,the active element T is electrically connected to the pixel electrodePE.

In the present embodiment, the first substrate SB1 further has a drivingcircuit GD and a driving circuit DD thereon. The driving circuit GD iselectrically connected to the scan lines SL1 to SLn. The driving circuitDD is electrically connected to the data lines DL1 to DLm.

The display medium layer L is located between the first substrate SB1and the second substrate SB2. The display medium layer L is, forexample, a liquid crystal or other display media.

The color conversion element C is located on the second substrate SB2.The color conversion element C includes, for example, a red filterpattern, a green filter pattern, and a blue filter pattern. In someembodiments, the color conversion element C may also include filterpatterns of other colors. In some embodiments, a black matrix (shown inFIG. 2B) is located between filter patterns of different colors.Although the color conversion element C is located on the secondsubstrate SB2 as an example in the present embodiment, the invention isnot limited thereto. In other embodiments, the color conversion elementC is located on the first substrate SB1 and forms a color filter onarray (COA) structure. In the present embodiment, the black matrix isused to define the area of the sub-pixels P. For example, the blackmatrix includes a plurality of openings, and each opening corresponds toone sub-pixel P.

The polarizer P1 and the polarizer P2 are respectively disposed on thefirst substrate SB1 and the second substrate SB2.

The touch device 200 is located on the display panel 100. In the presentembodiment, the touch device 200 is disposed between the polarizer P2and the second substrate SB2, but the invention is not limited thereto.In some embodiments, the polarizer P1 and the polarizer P2 are disposedbetween the first substrate SB1 and the second substrate SB2.

In the present embodiment, the display panel 100 includes a liquidcrystal display panel (such as a TN display panel, an MVA display panel,an AHVA display panel, etc.), but the invention is not limited thereto.In other embodiments, the display panel 100 may be a mini light-emittingdiode display panel, an organic light-emitting diode display panel, orother types of display panels.

FIG. 2A is a top view of a touch display device according to anembodiment of the invention. FIG. 2B is a top view of a touch electrodearea of a touch display device according to an embodiment of theinvention. FIG. 2C is a top view of a dummy electrode area of a touchdisplay device according to an embodiment of the invention. For ease ofexplanation, FIG. 2A shows an electrode structure and omits othercomponents. FIG. 2B shows an electrode structure, a conductive mesh, anda black matrix corresponding to one sub-pixel in the touch electrodearea and omits other components. FIG. 2C shows an electrode structure, aconductive mesh, and a black matrix corresponding to one sub-pixel inthe dummy electrode area and omits other components.

Referring first to FIG. 2A, FIG. 2B, and FIG. 2C, the touch device 200has a dummy electrode area DR and a touch electrode area TR. The touchdevice 200 includes an electrode structure 210 and a conductive mesh220.

The electrode structure 210 in the touch electrode area TR and theconductive mesh 220 in the touch electrode area TR form a drivingelectrode TX and a sensing electrode RX. The driving electrode TX mayextend along the first direction E1, the sensing electrode RX may extendalong the second direction E2, and the first direction E1 intersectedwith a second direction E2, for example. The driving electrode TX isseparated from the sensing electrode RX. The driving electrode TX andsensing electrode RX may be formed by other geometric shapes. In thisembodiment, the driving electrode TX is extending along the firstdirection E1 and the sensing electrode RX is extending along the seconddirection E2. However, the invention is not limited thereto. In otherembodiment, the driving electrode TX may extend along the seconddirection E2, and the sensing electrode RX may extend along the firstdirection E1.

The electrode structure 210 in the dummy electrode area DR and theconductive mesh 220 in the dummy electrode area DR form a dummyelectrode DE, and the dummy electrode DE is separated from the drivingelectrode TX and the sensing electrode RX. In the present embodiment,the dummy electrode DE is a floating electrode.

The electrode structure 210 includes a plurality of repeating electrodeunits 210U and a plurality of connecting structures CS. The repeatingelectrode units 210U are located in the dummy electrode area DR and thetouch electrode area TR. In other words, the dummy electrode DE, thedriving electrode TX, and the sensing electrode RX all include aplurality of repeating electrode units 210U. In the present embodiment,a black matrix BM has a plurality of openings O, and each of theopenings O corresponds to one sub-pixel P. Each of the repeatingelectrode units 210U is overlapped with at least one correspondingsub-pixel P. In the present embodiment, the vertical projection of eachof the repeating electrode units 210U is slightly offset from thevertical projection of the corresponding sub-pixel P. For example, eachof the repeating electrode units 210U is overlapped with two adjacentsub-pixels P. However, the invention is not limited thereto. In otherembodiments, each of the repeating electrode units 210U is overlappedwith one sub-pixel P. In some embodiments, the ratio of width to lengthof the sub-pixels P is about 1 to 3, but the invention is not limitedthereto. In some embodiments, the length of each of the sub-pixels P is120 microns to 270 microns and the width thereof is 40 microns to 90microns.

Each of the repeating electrode units 210U includes slit S. The slit Sof each of the repeating electrode units 210U may include slit portions,and for example, the slit S of each of the repeating electrode units210U includes two connected X-shapes. The slits S are formed by a slitportion S1 and slit portion S2. Slit portion S1 is a linear slit andSlit portion S2 is a bent slit connected to the linear slit. The slitportion S2 is a polyline slit or an arc slit. In the present embodiment,the two slit portions S1 are intersected to form an X shape, and the twoslit portions S2 are intersected to form another X shape. In otherembodiment, the slit S may be formed by a plurality of slit portions S2.In other word, the slit S may be formed by a combination of a polylineslit and an arc slit, a combination of a plurality of arc slits and anarc slit, or a combination of a plurality of polyline slits. In otherembodiment, one of the slit portions of the slit of the one of therepeating electrode units in the touch electrode area includes a Vshape. In other embodiment, one of the slit portions of the slit of theone of the repeating electrode units in the touch electrode area isformed by a linear slit and a bent slit connected with each other, andthe bent slit is a polyline slit or an arc slit. The connectingstructures CS are located in the slits S of the repeating electrodeunits 210U in the touch electrode area TR. In other words, the drivingelectrode TX and the sensing electrode RX both include the connectingstructures CS, and the dummy electrode DE does not include theconnecting structures CS. Therefore, the dummy electrode DE includes aplurality of island-like structures separated by the slits S. In otherembodiment, the connecting structures CS are in the touch electrode areaTR and not in the dummy electrode area DR such that (1) for one of therepeating electrode units 210U in the touch electrode area TR, the slitS includes a plurality of slit portions isolated with each other; and(2) for one of the repeating electrode units 210U in the dummy electrodearea DR, the slit S is continuous. In some embodiments, a width W2 ofthe connecting structures CS is 6 microns to 25 microns, but theinvention is not limited thereto.

In some embodiments, a width W1 of the slits S is 3 microns to 10microns. The configuration of the slits S on the dummy electrode DE mayprovide the touch device 200 with a lower capacitive load to achieve theeffect of high signal-to-noise ratio. Therefore, when used with thetouch display device, the depth of the active stylus touch on the touchdevice 200 may be successfully sensed. With the use of active stylus,when the user writes with greater force, the touch display device maydisplay a thicker handwriting, and when the user writes with less force,the touch control display device may display a thinner handwriting.

The dummy electrode DE and the driving electrode TX, the dummy electrodeDE and the sensing electrode RX, and the driving electrode TX and thesensing electrode RX are separated by slits SS as shown in FIG. 2A. Insome embodiments, the slits SS are formed by, for example, a pluralityof slits S, but the invention is not limited thereto.

In the present embodiment, the electrode structure 210 is a single layeror a multilayer structure, and the material thereof includes atransparent conductive material. In the present embodiment, the dummyelectrode area DR and the touch electrode area TR of the touch device200 have similar slit configurations, and therefore have similar slitcutting rules, and the difference is only in that the touch electrodearea TR has the connecting structures CS to alleviate the issue that thedummy electrode area DR and the touch electrode area TR have uneventransmittance affecting display quality. In some embodiments, thedifference in transmittance of the electrode structure 210 in the dummyelectrode area DR and the touch electrode area TR is about 0.22% to0.39%, but the invention is not limited thereto.

The conductive mesh 220 includes a plurality of reticulated repeatingunits 220U. The reticulated repeating units 220U are located in thedummy electrode area DR and the touch electrode area TR. In other words,the dummy electrode DE, the driving electrode TX, and the sensingelectrode RX all include a plurality of reticulated repeating units220U. Each of the reticulated repeating units 220U is overlapped with atleast one corresponding sub-pixel P. Each of the repeating electrodeunits 210U is overlapped with at least one corresponding sub-pixel P andat least one corresponding reticulated repeating unit 220U.

Each of the reticulated repeating units 220U includes a first X-shapedconductive structure X1 and a second X-shaped conductive structure X2.Two ends of the first X-shaped conductive structure X1 are connected totwo ends of the second X-shaped conductive structure X2. In the presentembodiment, the first X-shaped conductive structure X1 is adjacent tothe linear slit portion S1, and the second X-shaped conductive structureX2 is adjacent to the bent slit portion S2. The first X-shapedconductive structure X1 and the second X-shaped conductive structure X2are formed by, for example, at least one of a straight line, a polyline,and an arc.

The first X-shaped conductive structure X1 and the second X-shapedconductive structure X2 in the touch electrode area TR are in acontinuous pattern. The first X-shaped conductive structure X1 and thesecond X-shaped conductive structure X2 in the dummy electrode area DRare in a discontinuous pattern. In other words, the first X-shapedconductive structure X1 and/or the second X-shaped conductive structureX2 in the dummy electrode area DR are disconnected. Therefore, the dummyelectrode DE in the dummy electrode area DR is not connected to thedriving electrode TX and the sensing electrode RX via the conductivemesh 220. In the present embodiment, the conductive mesh 220 is locatedon the repeating electrode units 210U and the connecting structures CS,and the conductive mesh 220 of the dummy electrode DE is disconnected atthe slits S. As shown in FIG. 2B, for one of the reticulated repeatingunits 220U in the touch electrode area TR, the first X-shaped conductivestructure X1 has no break and is formed into a continuous pattern, andthe second X-shaped conductive structure X2 has no break and is formedinto another continuous pattern. As shown in FIG. 2C, for one of thereticulated repeating units 220U in the dummy electrode area DR, thefirst X-shaped conductive structure X1 has four breaks and is formedinto a discontinuous pattern, and the second X-shaped conductivestructure X2 has four breaks and is formed into another discontinuouspattern. However, the number of the breaks of the first X-shapedconductive structure X1 and the second X-shaped conductive structure X2can be adjusted. The invention is not limited thereto.

In the present embodiment, the conductive mesh 220 is a single layer ora multilayer structure, and the material thereof includes a metal, ametal oxide, a metal nitride, or other conductive materials. A linewidthW3 of the conductive mesh 220 is 3 microns to 12 microns.

In the present embodiment, the conductive mesh 220 in the touchelectrode area TR and the conductive mesh 220 in the dummy electrodearea DR have a similar shape design, and the difference is only that theconductive mesh 220 in the touch electrode area TR is in a continuouspattern and the conductive mesh 220 in the dummy electrode area DR is ina discontinuous pattern. As a result, the issue that the dummy electrodearea DR and the touch electrode area TR affecting the display qualitydue to uneven reflectance may be alleviated. In some embodiments, thedifference in reflectance of the conductive mesh 220 in the dummyelectrode area DR and the touch electrode area TR is about 3.4% to 4.4%,but the invention is not limited thereto.

In the present embodiment, each of the repeating electrode units 210U isoffset from at least one corresponding sub-pixel P along a first offsetdirection D1, and at least one corresponding reticulated repeating unit220U is offset from at least one corresponding sub-pixel P along asecond offset direction D2. In the present embodiment, the first offsetdirection D1 is opposite to the second offset direction D2, andtherefore the conductive mesh 220 is less readily formed in the slits S,such that the conductive mesh 220 has better process margin.

Based on the above, the resistance of the touch device 200 is reduced,and the performance of the touch display device is improved. Moreover,the configuration of the slits S on the dummy electrode DE may providethe touch device 200 with a lower capacitive load to achieve highsignal-to-noise ratio.

FIG. 3A is a top view of a touch electrode area of a touch displaydevice according to an embodiment of the invention. FIG. 3B is a topview of a dummy electrode area of a touch display device according to anembodiment of the invention. FIG. 3A and FIG. 3B show the electrodestructure 210, the conductive mesh 220, the sub-pixels P, and the blackmatrix BM and omits other components. It should be mentioned here that,the embodiment of FIG. 3A and FIG. 3B adopts the reference numerals ofthe embodiment of FIG. 2A to FIG. 2C and a portion of the contentsthereof, wherein the same or similar numerals are used to represent thesame or similar devices and descriptions of the same technical contentsare omitted. The omitted portions are as described in the aboveembodiments and are not repeated herein.

Referring to FIG. 3A and FIG. 3B, the repeating electrode units of theelectrode structure 210 include first repeating electrode units 210Uaand second repeating electrode units 210Ub. There is no second repeatingelectrode units 210Ub located between two adjacent first repeatingelectrode units 210Ua. There is no first repeating electrode units 210Ualocated between two adjacent second repeating electrode units 210Ub.Each of the slits S of the first repeating electrode units 210Ua and thesecond repeating electrode units 210Ub is two X shapes connected witheach other. However, the X shape of the slits S of the first repeatingelectrode units 210Ua is slightly different from the X shape of theslits S of the second repeating electrode units 210Ub.

The reticulated repeating units of the conductive mesh 220 include firstreticulated repeating units 220Ua and second reticulated repeating units220Ub. There is no second reticulated repeating units 220Ub locatedbetween two adjacent first reticulated repeating units 220Ua. There isno first reticulated repeating units 220Ua located between two adjacentsecond reticulated repeating units 220Ub. The difference between thefirst reticulated repeating units 220Ua and the second reticulatedrepeating units 220Ub is that the shape of the second X-shapedconductive structure X2 is slightly different.

The first repeating electrode units 210Ua are overlapped with the firstreticulated repeating units 220Ua, and the second repeating electrodeunits 210Ub are overlapped with the second reticulated repeating units220Ub. Two adjacent first repeating electrode units 210Ua and twoadjacent second repeating electrode units 210Ub are staggered along thefirst direction E1 and along the second direction E2, for example. Twoadjacent first reticulated repeating units 220Ua and two adjacent secondreticulated repeating units 220Ub are staggered along the firstdirection E1 and along the second direction E2, for example.

Via the configuration of the first repeating electrode units 210Ua, thesecond repeating electrode units 210Ub, the first reticulated repeatingunits 220Ua, and the second reticulated repeating units 220Ub, unevenbrightness (Mura) due to the regular arrangement may be improved.

FIG. 4A is a top view of a touch electrode area of a touch displaydevice according to an embodiment of the invention. FIG. 4B is a topview of a dummy electrode area of a touch display device according to anembodiment of the invention. FIG. 4A and FIG. 4B show the electrodestructure 210, the conductive mesh 220, the sub-pixels P, and the blackmatrix BM and omits other components. It should be mentioned here that,the embodiment of FIG. 4A and FIG. 4B adopts the reference numerals ofthe embodiment of FIG. 2A to FIG. 2C and a portion of the contentsthereof, wherein the same or similar numerals are used to represent thesame or similar devices and descriptions of the same technical contentsare omitted. The omitted portions are as described in the aboveembodiments and are not repeated herein.

The main difference between the embodiment of FIG. 4A and FIG. 4B andthe embodiment of FIG. 2A to FIG. 2C is that, in the embodiment of FIG.4A and FIG. 4B, the slits S of each of the repeating electrode units210U are V-shaped, and the slits S are formed by the linear slit portionS1 and the bent slit portion S2 connected to the linear slit portion S1.

Referring to FIG. 4A and FIG. 4B, the bent slit portion S2 is a polylineslit or an arc slit. The connecting structures CS are located in theslits S of the repeating electrode units 210U of the touch electrodearea TR such that for one of the repeating electrode units 210U in thetouch electrode area TR, the slit S includes a plurality of slitportions S1, S2, and each of the slit portions S1, S2 of the slit S inthe touch electrode area TR is discontinuous.

In the present embodiment, since the slits S are V-shaped, the number ofthe connecting structures CS in a single repeating electrode unit 210Uin the touch electrode area TR in the present embodiment is smallercompared to the embodiment of FIG. 2A to FIG. 2C. In the presentembodiment, the optical difference between the touch electrode area TRand the dummy electrode area DR caused by the connecting structures CSand the conductive mesh 220 overlapped with the connecting structures CSmay be further reduced. In some embodiments, the difference intransmittance of the electrode structure 210 in the dummy electrode areaDR and the touch electrode area TR is less than 0.1%, but the inventionis not limited thereto. In some embodiments, the difference inreflectance of the conductive mesh 220 in the dummy electrode area DRand the touch electrode area TR is less than 1%, but the invention isnot limited thereto.

FIG. 5A is a top view of a touch electrode area of a touch displaydevice according to an embodiment of the invention. FIG. 5B is a topview of a dummy electrode area of a touch display device according to anembodiment of the invention. FIG. 5A and FIG. 5B show the electrodestructure 210, the conductive mesh 220, the sub-pixels P, and the blackmatrix BM and omits other components. It should be mentioned here that,the embodiment of FIG. 5A and FIG. 5B adopts the reference numerals ofthe embodiment of FIG. 4A and FIG. 4B and a portion of the contentsthereof, wherein the same or similar numerals are used to represent thesame or similar devices and descriptions of the same technical contentsare omitted. The omitted portions are as described in the aboveembodiments and are not repeated herein.

Referring to FIG. 5A and FIG. 5B, the repeating electrode units of theelectrode structure 210 include the first repeating electrode units210Ua, the second repeating electrode units 210Ub, third repeatingelectrode units 210Uc, and fourth repeating electrode units 210Ud. Theslits S of the first repeating electrode units 210Ua, the secondrepeating electrode units 210Ub, the third repeating electrode units210Uc, and the fourth repeating electrode units 210Ud are all V-shaped.However, the V shapes of the slits S of the first repeating electrodeunits 210Ua, the second repeating electrode units 210Ub, the thirdrepeating electrode units 210Uc, and the fourth repeating electrodeunits 210Ud are slightly different.

The reticulated repeating units of the conductive mesh 220 include firstreticulated repeating units 220Ua and second reticulated repeating units220Ub. The difference between the first reticulated repeating units220Ua and the second reticulated repeating units 220Ub is that the shapeof the second X-shaped conductive structure X2 is slightly different.

Two adjacent first reticulated repeating units 220Ua are overlapped withthe first repeating electrode unit 210Ua and the second repeatingelectrode unit 210Ub, respectively. Two adjacent second reticulatedrepeating units 220Ub are overlapped with the third repeating electrodeunit 210Uc and the fourth repeating electrode unit 210Ud, respectively.Two adjacent first reticulated repeating units 220Ua and two adjacentsecond reticulated repeating units 220Ub are staggered along the firstdirection E1 and along the second direction E2, for example. The firstrepeating electrode unit 210Ua is connected to the second repeatingelectrode unit 210Ub. The third repeating electrode unit 210Uc isconnected to the fourth repeating electrode unit 210Ud. The connectedfirst repeating electrode unit 210Ua and second repeating electrode unit210Ub are staggered with the connected third repeating electrode unit210Uc and fourth repeating electrode unit 210Ud. The first repeatingelectrode unit 210Ua, the second repeating electrode unit 210Ub, thethird repeating electrode unit 210Uc and the fourth repeating electrodeunit 210Ud are arranged consecutively along the first direction E1, forexample.

Via the configuration of the first repeating electrode units 210Ua, thesecond repeating electrode units 210Ub, the third repeating electrodeunits 210Uc, the fourth repeating electrode units 210Ud, the firstreticulated repeating units 220Ua, and the second reticulated repeatingunits 220Ub, uneven brightness (Mura) due to the regular arrangement maybe improved.

FIG. 6A to FIG. 9A are top views of a manufacturing method of a touchdevice according to an embodiment of the invention. FIG. 6B to FIG. 9Bare cross-sectional views of section line aa′ of FIG. 6A to FIG. 9A,respectively. For ease of explanation, the pattern of each film layer ofthe touch devices in FIG. 6A to FIG. 9A and FIG. 6B to FIG. 9B is onlydrawn in a simple geometric pattern, but each film layer of the touchdevice of the invention is not limited to the patterns in FIG. 6A toFIG. 9A and FIG. 6B to FIG. 9B.

Referring to FIG. 6A and FIG. 6B, a first conductive layer 212 is formedon the second substrate SB2. The first conductive layer 212 includes afirst touch electrode layer 212 a located in the touch electrode area TRand a first dummy electrode layer 212 b located in the dummy electrodearea DR. The first touch electrode layer 212 a is separated from thefirst dummy electrode layer 212 b. The first touch electrode layer 212 aincludes first portions 212 a-1 extended along a first direction E1 andsecond portions 212 a-2 extended along a second direction E2. The firstportions 212 a-1 are separated from the second portions 212 a-2. In thepresent embodiment, the first portions 212 a-1 separate a plurality ofsecond portions 212 a-2. In the present embodiment, the material of thefirst conductive layer 212 is a transparent conductive oxide such asindium tin oxide, but the invention is not limited thereto.

Referring to FIG. 7A and FIG. 7B, a conductive mesh 220 is formed on thefirst conductive layer 212. In the present embodiment, the conductivemesh 220 is formed in the touch electrode area TR and the dummyelectrode area DR. In the present embodiment, the conductive mesh 220 isoverlapped with the first portions 212 a-1, the second portions 212 a-2,and the first dummy electrode layer 212 b. The conductive mesh 220 is,for example, a single layer or a multilayer structure, and the materialof the conductive mesh 220 is a metal, a metal oxide, a metal nitride,or other conductive materials. For example, the conductive mesh 220 is amolybdenum nitride/aluminum/molybdenum nitride layer (MoN/Al/MoN).

Referring to FIG. 8A and FIG. 8B, an insulating layer 230 is formed onthe conductive mesh 220. In the present embodiment, the insulating layer230 is overlapped with the first portions 212 a-1 (shown in FIG. 6A)between two adjacent second portions 212 a-2.

Referring to FIG. 9A and FIG. 9B, a second conductive layer 214 isformed on the insulating layer 230 and the conductive mesh 220. Theelectrode structure 210 includes a first conductive layer 212 and asecond conductive layer 214. The conductive mesh 220 is located betweenand contacts the first conductive layer 212 and the second conductivelayer 214.

The second conductive layer 214 includes a second touch electrode layer214 a located in the touch electrode area TR and a second dummyelectrode layer 214 b located in the dummy electrode area DR. The secondtouch electrode layer 214 a is separated from the second dummy electrodelayer 214 b. The second touch electrode layer 214 a includes firstportions 214 a-1 extended along the first direction E1 and secondportions 214 b-2 extended along the second direction E2. The firstdirection E1 is perpendicular to the second direction E2. The firstportions 214 a-1 are separated from the second portions 214 a-2. In thepresent embodiment, the second portions 214 a-2 separate a plurality offirst portions 214 a-1, and the plurality of separated second portions212 a-2 in the first conductive layer 212 are electrically connected toeach other via the second portions 214 a-2 of the second conductivelayer 214. In the present embodiment, the material of the secondconductive layer 214 is a transparent conductive oxide such as indiumtin oxide, but the invention is not limited thereto.

In the present embodiment, the electrode structure 210 in the touchelectrode area TR and the conductive mesh 220 in the touch electrodearea TR form the driving electrode TX and the sensing electrode RX. Thefirst direction E1 of the driving electrode TX is intersected with thesecond direction E2 of the sensing electrode RX, and the drivingelectrode TX is separated from the sensing electrode RX. In thisembodiment, the driving electrode TX is extending along the firstdirection E1 and the sensing electrode RX is extending along the seconddirection E2. However, the invention is not limited thereto. In otherembodiment, the driving electrode TX may extend along the seconddirection E2, and the sensing electrode RX may extend along the firstdirection E1.

In the present embodiment, the first portions 212 a-1 of the firstconductive layer 212, the first portions 214 a-1 of the secondconductive layer 214, and a portion of the conductive mesh 220overlapped with the first portions 212 a-1 and the first portions 214a-1 form the driving electrode TX; the second portions 212 a-2 of thefirst conductive layer 212, the second portions 214 a-2 of the secondconductive layer 214, and a portion of the conductive mesh 220overlapped with the second portions 212 a-2 and the second portions 214a-2 form the sensing electrode RX.

In the present embodiment, the first dummy electrode layer 212 b, thesecond dummy electrode layer 214 b, and a portion of the conductive mesh220 overlapped with the first dummy electrode layer 212 b and the seconddummy electrode layer 214 b form the dummy electrode DE. In other words,dummy electrode DE is included in the dummy electrode area DR, and thedummy electrode DE is separated from the driving electrode TX and thesensing electrode RX.

At this point, the touch device 200 is substantially completed. In someembodiments, the touch device 200 optionally further includes aprotective layer (not shown) covering the second conductive layer 214.

Based on the above, the resistance of the touch device 200 is reduced,and the performance of the touch display device is improved. Moreover,the configuration of the slits S on the dummy electrode DE may providethe touch device 200 with a lower capacitive load to achieve highsignal-to-noise ratio.

Although the invention has been described with reference to the aboveembodiments, it will be apparent to one of ordinary skill in the artthat modifications to the described embodiments may be made withoutdeparting from the spirit of the invention. Accordingly, the scope ofthe invention is defined by the attached claims not by the abovedetailed descriptions.

What is claimed is:
 1. A touch display device, comprising: a displaypanel comprising a plurality of sub-pixels, wherein each of thesub-pixels comprises a pixel electrode and a switching elementelectrically connected to the pixel electrode; and a touch devicelocated on the display panel and having a touch electrode area and adummy electrode area, wherein the touch device comprises an electrodestructure and a conductive mesh, the conductive mesh comprises aplurality of X-shaped conductive structures distributed in the dummyelectrode area, each of the X-shaped conductive structures is overlappedwith at least corresponding one of the sub-pixels, wherein the electrodestructure comprises: a plurality of repeating electrode unitsdistributed in the dummy electrode area and the touch electrode area,wherein each of the repeating electrode units is overlapped with atleast corresponding one of the sub-pixels, and each of the repeatingelectrode units comprises a slit; and a plurality of connectingstructures located in the touch electrode area and not in the dummyelectrode area such that: for one of the repeating electrode units inthe touch electrode area, the slit includes a plurality of slitportions, and each of the slit portions of the slit in the touchelectrode area is discontinuous; and for one of the repeating electrodeunits in the dummy electrode area, the slit is continuous.
 2. The touchdisplay device of claim 1, wherein the slit of the one of the repeatingelectrode units in the dummy electrode area includes two X shapesconnected with each other.
 3. The touch display device of claim 2,wherein one of the slit portions of the slit of the one of the repeatingelectrode units in the touch electrode area includes a V shape.
 4. Thetouch display device of claim 3, wherein one of the slit portions of theslit of the one of the repeating electrode units in the touch electrodearea is formed by a linear slit and a bent slit connected with eachother, and the bent slit is a polyline slit or an arc slit.
 5. The touchdisplay device of claim 1, wherein a width of one of the slits is 3microns to 10 microns.
 6. The touch display device of claim 1, wherein awidth of one of the connecting structures is 6 microns to 25 microns. 7.The touch display device of claim 1, wherein each of the repeatingelectrode units is offset from the at least corresponding one sub-pixelalong a first offset direction.
 8. The touch display device of claim 1,wherein a material of the conductive mesh comprises a metal, a metaloxide, or a metal nitride.
 9. The touch display device of claim 1,wherein a material of the electrode structure comprises a transparentconductive material.
 10. The touch display device of claim 1, wherein aratio of width to length of each of the sub-pixels is 1:3.
 11. The touchdisplay device of claim 1, wherein a length of each of the sub-pixels is120 microns to 270 microns and a width thereof is 40 microns to 90microns.
 12. The touch display device of claim 1, wherein the electrodestructure comprises a first conductive layer and a second conductivelayer, and the conductive mesh is located between the first conductivelayer and the second conductive layer.
 13. The touch display device ofclaim 1, wherein a linewidth of the conductive mesh is 3 microns to 12microns.
 14. A touch display device, comprising: a display panelcomprising a plurality of sub-pixels, wherein each of the sub-pixelscomprises a pixel electrode and a switching element electricallyconnected to the pixel electrode; and a touch device located on thedisplay panel and having a touch electrode area and a dummy electrodearea, wherein the touch device comprises an electrode structure and aconductive mesh, the conductive mesh comprises a plurality of X-shapedconductive structures distributed in the dummy electrode area, each ofthe X-shaped conductive structures is overlapped with at leastcorresponding one of the sub-pixels, wherein the electrode structurecomprises a first conductive layer and a second conductive layer, andthe conductive mesh is located between the first conductive layer andthe second conductive layer, wherein the second conductive layercomprises a second touch electrode layer in the touch electrode area,the second touch electrode layer comprises a plurality of first portionsextending along a first direction and a plurality of second portionsextending along a second direction perpendicular to the first direction,and the first portions are separated from the second portions.
 15. Thetouch display device of claim 14, wherein the second conductive layerfurther comprises a second dummy electrode layer located in the dummyelectrode area, and the second touch electrode layer is separated fromthe second dummy electrode layer.
 16. The touch display device of claim14, wherein the electrode structure comprises: a plurality of repeatingelectrode units distributed in the dummy electrode area and the touchelectrode area, wherein each of the repeating electrode units isoverlapped with at least corresponding one of the sub-pixels, and eachof the repeating electrode units comprises a slit; and a plurality ofconnecting structures located in the touch electrode area and not in thedummy electrode area, and the slit in one of the repeating electrodeunits in the touch electrode area includes a plurality of slit portions,wherein the slit of one of the repeating electrode units in the dummyelectrode area includes two X shapes connected with each other.
 17. Thetouch display device of claim 16, wherein one of the slit portions ofthe slit of the one of the repeating electrode units in the touchelectrode area includes a V shape.
 18. The touch display device of claim17, wherein one of the slit portions of the slit of the one of therepeating electrode units in the touch electrode area is formed by alinear slit and a bent slit connected with each other, and the bent slitis a polyline slit or an arc slit.
 19. The touch display device of claim14, wherein the electrode structure comprises: a plurality of repeatingelectrode units distributed in the dummy electrode area and the touchelectrode area, wherein each of the repeating electrode units isoverlapped with at least corresponding one of the sub-pixels, and eachof the repeating electrode units comprises a slit, wherein a width ofthe slit is 3 microns to 10 microns.
 20. The touch display device ofclaim 14, wherein the electrode structure comprises: a plurality ofrepeating electrode units distributed in the dummy electrode area andthe touch electrode area, wherein each of the repeating electrode unitsis overlapped with at least corresponding one of the sub-pixels, andeach of the repeating electrode units comprises a slit; and a pluralityof connecting structures located in the touch electrode area and not inthe dummy electrode area, wherein a width of one of the connectingstructures is 6 microns to 25 microns.
 21. A touch display device,comprising: a display panel comprising a plurality of sub-pixels,wherein each of the sub-pixels comprises a pixel electrode and aswitching element electrically connected to the pixel electrode; and atouch device located on the display panel and having a touch electrodearea and a dummy electrode area, wherein the touch device comprises anelectrode structure and a conductive mesh, the conductive mesh comprisesa plurality of X-shaped conductive structures distributed in the dummyelectrode area and a plurality of patterns distributed in the touchelectrode area, wherein a portion of one of the patterns distributed inthe touch electrode area comprises a V shape, and wherein the electrodestructure comprises: a plurality of repeating electrode unitsdistributed in the dummy electrode area and the touch electrode area,wherein each of the repeating electrode units is overlapped with atleast corresponding one of the sub-pixels, and each of the repeatingelectrode units comprises a slit; and a plurality of connectingstructures located in the touch electrode area and not in the dummyelectrode area such that: for one of the repeating electrode units inthe touch electrode area, the slit includes a plurality of slitportions, and each of the slit portions of the slit in the touchelectrode area is discontinuous.
 22. The touch display device of claim21, wherein the slit of one of the repeating electrode units in thedummy electrode area includes two X shapes connected with each other.23. The touch display device of claim 22, wherein one of the slitportions of the slit of the one of the repeating electrode units in thetouch electrode area includes a V shape.
 24. The touch display device ofclaim 23, wherein one of the slit portions of the slit of the one of therepeating electrode units in the touch electrode area is formed by alinear slit and a bent slit connected with each other, and the bent slitis a polyline slit or an arc slit.
 25. The touch display device of claim21, wherein a width of one of the connecting structures is 6 microns to25 microns.